How to Unroot Nexus S! [i9020T][i9020A][i9023]

Posted onOctober 12, 2011byNexus S Hacks

Need to return your Nexus S back to T-Mobile your any other carrier for any reason? Well, you can unroot your Nexus S completely back to stock, very easy to do by following the step-by-step guide outlined here.

You should see that the LOCK STATE on the Nexus S screen change from UNLOCKED to LOCKED.

That’s it, you’ve fully unrooted your Nexus S! Now, there might still be your files on the internal storage such as your photos, videos, and other personal files, just make sure you back them up before you return your phone.

Nexus S Reference
You will need a rooted Nexus S to install all ROM/kernels.NOTE: PLEASE ONLY INSTALL ROMS INTENDED FOR YOUR VERSION OF Nexus S! Otherwise you WILL BRICK YOUR PHONE and I will not be responsible!How to Root Nexus S!

Hi…
I had the same problem with the error 7.
That’s how I solved it:
-root your phone again. also install the clockworkmode recovery again.
-after that just unroot your phone again. and fore guarantee usage lock the bootloader.
now everything should work fine.

Oh thats jerky.. than i unfornatley have no idea how to solve the problem. By the way i have rootet my SNS with one click root software. I’d like to post you the link aubout the software but i didn’t fint that page again. :/

I have nexus s I9023 i had rooted it and has flashed ICS on it now i am trying unroot it to stock, i had initially my mistake had flashed nexus s 4G stock. Now i have rooted it again and trying to flash nexus s stock & i am following the procedure mentioned above to unroot nexus s stock. When i try to install the above zip file (Download i9020t_i9023.zip) it says signature cannot be verified and it aboreds installation….need help.

Could it be, that you have but your phone back to stock with 1-click software? If so, I had the same issue. Luckily i had made a backup before installing the wrong rom. So i just had to root the phone again, installed CWM recovery and set the phone with the backup back! After that, i used the instructions on this page to set my phone back to stock.

what you can do is root your phone again then got market download ROM MANAGER update the bootloader to latest version then shut down your phone then open the bootloader it should be in blue color. Now try to install the zip file (i9020t_i9023.zip) before that wipe your data & cache it will work. Thatz how it worked for me.

installed sdk manager and avd manager….extracted fastboot into c: drive ….named the map ´´fastboot´´’.
But when i do these steps to lock the bootloader it just says .
i have a i9023 with stock 2.6
..iv tryed evrything..

Hi guys, I’m stuck with a problem…
I tried to unroot my nexus s in order to install the ICS update.. I connected my phone to my computer to make a last back up, turned off my phone and since then i cannot do anything with my phone anymore :s

When i try to turn it on again i got the google icon (with the unlock) and then my phone crashes in the appearing X (x appears forever).

If i try to open it in recoverymode i got a message “no boot or recovery img” and i am stuck in my bootloader. I am unable to connect my phone to my computer again because it’s turned off and i cant go in recovery..

thanks a lot. it work for me.I had the same problem with the error 7 and it solved with reinstal the clockworkmode recovery. my question is: shold i see the clockworkmod when my phone is conect to usb on the computer? i think i need to see the stock recovery. sorry for my english

Cannot get my bootloader to lock. Ive downloaded the fastboot and have extracted it to my c drive but when I go through to the last bit Type in astboot oem lock, it just says waiting for device. Nothing happens and my bootloader remains unlocked. Help

HI Nexus Hacks, canzona tour helpme please.after i haved do this in my Nexus s i9023 but when i go in fastboot is this version
Bootloader version i9020xxKA3
Basebamd version I9020XXKF1
is Normale or not?
Thankyou
Help me please

I have a problem nexhack
Evrytime i start phone without plugin bettry
It stuck on “Downloading do not turn off the target”
Then i have to pull out battry
Plug in charger
And put in bettry while pluged in power
Then start normal.
Please help me

Hi. Just thought i’d offer an update based on my experience in case it may help.

The guides are really excellent by the way.
Only problem i had putting back to stock is that the version of clockwork mod in the old post to root (3101.img), wouldn’t allow me to flash std ROM. I got error – assert failed: getprop(“ro.product.device”) == “crespo” || getprop(“ro.build.product”) == “crespo”

I had to install clockwork-5.0.2.0 to get it to flash back. Also ROM manager wouldn’t flash new recovery – gave a permissions error.

Please help me, one day I woke up and turned on my phone. I took it out half an hour later to find it was still at the bootloader. Followed steps to unroot but when went to turn on x logo came up forever. HELP please!!!!!

I am trying to Unroot my Nexus S.
I am stuck after step 2.
I copied the i9020t_i9023.zip to my internal storage.
Then boot into bootloader by holding down both Volume Up and Power buttons.
Then I chose “Recovery”, then it gets stuck at the first Google screen!

some one please reply to my problem plz plz plz
i have nexus s
after updating it is on a triangle ” Downloading Do not turn off the target”
i pulled out battery plugged in and battry recharge came on screen and i pressed power button it started normal.
but again without plugged in charging it show that triangle
means i need to plug in my phone to restart it.
please tell me what to do ?

Hi…I’m having some problems with my nexus s right now.. please help me ?

I’m having the i9023 version , successfully rooted last time, and after rooted this phone when I wanted to unroot it I thought of deleting it will do.. then instead of deleting the Superuser I’ve disabled it . .. Only realized after like few weeks that I can enable it back. I’m such a noob.. sorry. Then when I’ve enabled it back its like somewhere goes wrong. I cant proceed to root access. Every apps that needed superuser isn’t working anymore.

Then I went online to check whether is there any methods from nexushacks to unroot my phone back ? Then I see this thread. I wanted to unroot it back so badly but its not working. I’ve went to bootloader > recovery mode but its not the clockworkmod. ( Then only I realize it is something to be flash to the phone but I dont understand the articles ) I’ve entered to install updates there. But then the installation failed and aborted, why?

Before this please understand that I think It probably not because of the guide got mistake but my phone. My phone started to be like, cannot detect from my PC BEFORE I STARTED TO TRY TO UNROOT MY PHONE. But its fine to charge with using USB cable plug. Just that I got no ways to access to my mass storage from my PC.

I thought a Factory reset might help. I did that. Nothing happen. It remains the same…

Can you guys please help me to solve this problem? Thankyou very very much. 🙁

I tried your instructions. It went back to a 2.6.5 version of android and it would indicate emergency calls only even when it actually could make phone calls, and receive data trough my provider network. I did not like it and decided to root my phone again. Unfortunately this time around, after unlocking it, it would not allow me to flash the recovery image. All I would get is ” error: cannot load recovery3101″

Hey I had rooted my phone some 7-8 months ago. I have 2.3.3 version and now i am trying to use this guide to unroot but when i say it to install the i9023 version it just says installation aborted. what do i do?

Hello.
I find your blog very helpful.
I followed your instruction to root my nexus s
and now i want it back unrooted. But i got a few questions tho;

1. i have the clockworkMod recovery v.5.0.2.0, but i have no os. so everytime i reboot it will just go back to the recovery page. Is it possible for me to unroot my phone and later after unrooting it, install the official ics release? or the unrooting will disable any os installation?

i really need your insight. it would be so super and kind of you to help me figuring this out. ^_^
thank you very much,

This was the zip file that I was trying to install “soju-grk39f-factory-5ab09c98.tgz”… Now I unzipped that and found “image-soju-grk39f.zip” within that tgz file. But when I try to install the “image-soju-grk39f.zip” within CWM, the installation fails :s…

Shoot, I don’t really have time today but probably next week? Sorry man, my schedule is really booked up this whole week but let me see what I can do. If nothing gets updated, hit me up next week at zedomax@gmail.com I can surely do it then.

Hey, no worries man, you’re a hero lol! I can’t find any simple procedures in English for how to do a complete (and I mean COMPLETE) wipe and clean install using Fastboot for my Nexus S. I am using a Mac and I’ve downloaded the Android SDK as well as the IMM76D factory 4.0.4 Soju image. Everything is ready for your magic :D.

It’s fun learning how everything works with the Nexus S and I’m beginning to feel a lot more comfortable using it 😀

Okay, so I used the i9020t zip file that you provided and it reimaged successfully… But, When looking under the Wireless and Network Settings, I can not enable NFC anymore. It is displaying “An error occurred” underneath “NFC” and the checkbox will not activate… Help please 😀

Hey can some please help!!….I did everything step by step and successfully unrooted the phone .Now its on 2.3.6 and it says ‘locked’. The problem I am not getting the signal of the network my phone is on. Its on roaming and I’ve tried many times by switching it off, though there is full signal strength on my rooted galaxy S2. Someone please help asap as I have to send this phone!!!…
Thanks….

If i am on a rom (aokp) did i will get the update of google for 4.1.1 even if im on a rom or i need to go back stock to have the 4.1.1 update? i know i can have jelly bean rom but not working for me!! so did i will get the update if im on a rom???

HI, I am on MIUI and hate it, I flashed the OTA 4.0.4 file and can use it and it is amazing, but I want jelly bean, but when I try to install it from OTA , it says status 7 error, I have also tried downloading JB ROMS for my version and they still dont work, will unrooting and installing the JB ROM and rooting again fix this?

Hi, I ended up Unrooting and rooting again, now i am trying to get everything backs as I copied the CMD and TB folders to my desktop, but I have no access even though the bootloader status is unlocked, going to try to install 4.0.4 and do your method again.

I have I9020T, but I have updated I9020a regardless.
Now I cannot update any rom (I tried to root again but I couldn’t. there is a problem with driver. it shows Android 1.0 and I couldn’t find any driver for it).
Is there anyone has any suggestion?
Thanks,

whene I go to rom manager and i click in resoudre les problemes de permission it says erreur pour lancer une commande avec les permission root because whene i like to patch some app it says go to titanuim backup and the titanuim backup it says acces root echec ans the message of super utilisateur not displayed in any app even in list superuser app nothing is displayed ..
help me pleas

I use your nexus S root some time ago. It work perfect. After that my phone update 2-3 times to 4.1.x.
After first update to 4.0 the root stop working, i know i have to root it again. But didnt take the time for backup all my stuff on phone and didnt root it again. The superuser program was on my phone but when i start root checker it says it is not rooted.
So i try to root it with your new tutorial for ICS. I did all what was in tutorial. After that i try root checker and it still say that the phone is not root-ed. After that I try to unroot phone with unroot nexus S tutorial. I have instaled i9020 rom i downloaded from begining of this tutorial. Now I have on my phone 2.3.6 and when I try to update phone to 4.x it says that the latest version of ROM is on system. What to do now to upgrade phone to 4.x and after that to root phone ??

one question to root resp. unroot. Could I see if the NXS was rooted? Is there a log for those information and could I delete these logfile (of course it is possible to delete).
Or are this information that the world do not need ..?? (´casue i want to buy a NXS – therefore the question)

But i have a problem.
when i try to unlock, it say FAILED (remote: Erase Fail)

actually my phone stuck on google logo(white). it can go to recovery mode. i tried to make a wipe data/factory restore but it says:
e:format_volume: make_extf4fs failed on /dev/block/platform/s3c-sdhci.0/by-name/userdata

but it formats the cache. and then it says Data Wipe complete.
please help.

The power button of my phone doesn’t work.
It was rooted and I have used the adb, but after I flashed the stock rom I can’t go to the recovery to wipe/reset factory, because when I boot the phone I always get errors and it’s impossible to connect the phone by adb.

I have followed these instructions exactly, and now I can’t connect to my carrier – says “emergency calls only”. When I search for networks it can’t find my Carrier (Wind Mobile). Since this has happened, I have also flashed the LATEST stock rom from google’s factory images (4.1.2) and still have the same problem of not finding my carrier. Is there a way to fix this?